Mr. Joshi and Mr. Chandra started a business investing Rs. 3800 and Rs. 4600 respectively. If net gain of Rs. 945 was to be distributed in accordance with their investment, what would be share of Mr. Joshi ?

A man covers a certain distance upto the post office with the speed of 4 km/hr and returns back with the speed of 3 km/hr. If he covered the total distance in 3 1/2 hr, what was the total distance he covered.